Chapter 3. Operating Instructions; Pressurization Guidelines; Flow Meter Display/Keypad - Panametrics PanaFlow MV80 User Manual

Chapter 3. Operating Instructions

After installing the PanaFlow Vortex Flow Meter per the instructions in the previous chapter, you are ready to begin
operation. The sections in this chapter explain the meter start-up, the display/keypad commands and the
programming steps. The meter is ready to operate at start up without any special programming. However, to enter
parameters and system settings unique to your application, see the following sections for instructions on using the
setup menus.
WARNING!
3.1

Pressurization Guidelines

WARNING!
Pipeline pressure surges are caused by a sudden increase in pressure produced when a line is charged too rapidly,
often by quickly opening a control valve. The following steps should be taken to minimize the likelihood of a pressure
surge damaging the PanaFlow MV80/82 vortex flow meter:
1. The vortex flow meter must be located a minimum of 10 pipe diameters downstream from the pressure release
valve, but 15 pipe diameters is recommended whenever possible.
2. Gradual pressurization of the process line is essential. It is important to control and minimize the rate of pipeline
pressurization in order to minimize the pressure surge and water hammer effect.
WARNING!
3.2

Flow Meter Display/Keypad

The flow meter digital electronics enable you to set, adjust, and monitor system parameters and performance. A full
range of commands are available through the display/keypad. The LCD display provides 2 x 16 characters for flow
monitoring and programming. The six push-buttons can be operated in non-hazardous environments with the
enclosure cover removed, In hazardous environments, the explosion-proof cover must remain in place and the
keypad operated with a hand-held magnet positioned at the side of the enclosure (see Figure 94 on page 74). To
secure the enclosure cover use a 1/16" hex key wrench to tighten the 6-32 x 1/4 cup point socket set locking screw.
PanaFlow™ MV80, MV82 & MV84 User's Manual
Do not open covers when an explosive atmosphere may be present.
During operation of the flow meter, it is important to minimize the risk of severe damage
to the instrumentation which can be caused by a pipeline pressure surge.
A rapid increase in the pipeline pressure can result in exceeding the flow meter design
specifications and result in risks to safety, assets, and the environment.
Chapter 3. Operating Instructions
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